Marketing Data Engineer - Ad Tech (US hours)

Our client in the US is looking for a Marketing Data Engineer to own the data pipelines and data-quality foundation that power their dashboards, pacing outputs and recurring reporting. Core responsibilities Build and maintain API/ETL ingestion from DSPs, ad servers and other advertising platforms. Normalize campaign data and maintain metric definitions used across dashboards and reporting. Manage cloud-warehouse structures and client data deliveries where required. Reconcile pipeline output against raw platform exports and investigate material variance. Build automated data-quality checks, alerting and monitoring for pipeline/dashboard health. Manage service-account/API credential workflows in the clients owned environments. Support platform migrations and rebuild data integrations without reporting discontinuity. Partner with Dashboard Developer and Programmatic Lead on definitions, mapping and release validation. Requirements Must-have profile 4+ years in data engineering/analytics engineering with production ETL/API responsibility. Strong SQL plus at least one production programming/scripting language such as Python. Experience with cloud data warehouses such as BigQuery, Snowflake or equivalent. Experience reconciling data across multiple source systems and designing data-quality controls. Ability to own production pipelines, troubleshoot failures and document data definitions clearly. Preferred experience Direct experience with advertising/marketing platform APIs and cam